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Using hydrogen as an additive to enhance the conventional diesel engine performance has been investigated by several researchers and the outcomes are very promising. However, the problems associated with the production and storage of pure hydrogen currently limits the application of pure hydrogen in diesel engine operation. On-board hydrogen–oxygen generator, which produces H 2 /O 2 ...
Soapnut (Sapindus mukorossi) oil, a nonedible straight vegetable oil was blended with petroleum diesel in various proportions to evaluate the performance and emission characteristics of a single cylinder direct injection constant speed diesel engine. Diesel and soapnut oil (10%, 20%, 30% and 40%) fuel blends were used to conduct short-term engine performance and emission tests at varying loads in...
The present work investigates the effect of varying the combustion chamber geometry on the performance of a diesel engine using biodiesel in terms of brake specific fuel consumption, brake thermal efficiency as well as exhaust emissions and combustion characteristics. Engine tests have been carried out using a blend of 20% Pongamia Oil Methyl Ester (POME) with standard diesel as fuel and with three...
The present work focuses on finding the suitability of cotton seed oil as a fuel for diesel engines by comparing the different methods to improve the performance of neat cotton seed oil (CSO). Tests were conducted with neat CSO and diesel to obtain base data. Transesterification with alcohol, preheating of CSO and diesel–CSO blends; blending of orange oil, diesel, or diethyl ether (DEE) with CSO and...
Experiments were conducted to evaluate the combustion, performance and emission parameters of a single cylinder, four stroke, air cooled, direct injection diesel engine, fueled with used transformer oil (UTO) and six of its diesel blends on varying the UTO concentration from 10% to 60%, at a regular interval of 10% by volume basis. The results were analyzed and compared with diesel operation. Increase...
Early investigations on the use of tyre pyrolysis oil (TPO) blended with diesel of 10–90% exhibited longer ignition delay, as a result of the lower cetane number of TPO, as well as the blends. In the experimental investigation, TPO was blended with Jatropha Methyl Ester (JME), whose cetane number is higher than that of diesel, and used as an alternative fuel in a single cylinder, four stroke, air...
Although natural gas can be used in diesel engines, it causes poor performance and emissions at some engine loads. This study proposes using natural gas in a diesel engine as a dual fuel, and investigates the effects of employing diethylether (DEE) as an additive for eliminating some drawbacks of natural gas. The test fuels used in this study were diesel fuel, standard dual fuel containing 40% natural...
The change of intake oxygen content caused by altitude variation and the change of fuel oxygen content both affect the performance of diesel engines. In this paper, comparative experiments were performed on a high pressure common rail diesel engine fueled with pure diesel and biodiesel–ethanol–diesel (abbreviated as BED) blends with oxygen content of 2%, 2.5%, and 3.2% in mass percentage at different...
The thirst for fuel is steadily increasing as technology continues to open new areas of exploration. At the same time, the indiscriminate extraction of fossil fuels also may result in extinction of petroleum deposits in foreseeable future. Along with this, pollutant emission from diesel engines causes major impacts on ecological systems. In order to overcome the above problems associated with the...
As the reduction of fossil fuel resources, environment threat, aggrandizement in energy demand and escalation in the cost of hydrocarbon fuels has caused interests in the evolution of alternative fuels for existing IC engines. Several researchers are promoting novel ideas and cutting edge technology which would eventually lead to leap fogging innovation and breakthrough in the area of alternative...
In this study, animal fat based biodiesels produced in the pilot plant were blended with certain amounts of diesel fuel and bioethanol. Neat biodiesels, diesel fuel and the blends were tested in a direct injection diesel engine and engine performance, combustion and exhaust emission characteristics were investigated. Engine tests were conducted at constant engine speed (1400rpm) and four different...
In this work, the effects of blending n-pentanol, a second generation biofuel with diesel on the performance and emission characteristics of a diesel engine under exhaust gas recirculation (EGR) conditions are investigated. Tests were performed on a single-cylinder, constant-speed, un-modified, direct-injection diesel engine using four n-pentanol/diesel blends: 10%, 20%, 30% and 45% (by volume). The...
This study aimed to investigate the effect of conventional diesel engine through the addition of H2 mixture, generated through water electrolysis. In this work, three different ratios of diesel–hydrogen blends, 0%, 0.6% and 1.2% hydrogen by volume used, respectively. The experiments were carried out at the idling condition under constant speed from the low to high engine load with the different amount...
The Indian Railways is now looking to phase in biodiesel up to 5% of the total fuel consumption in its vast fleet of over 4000 diesel locomotives, and to achieve this various biofuels are being tested for their performance and emissions characteristics. In this study, a dual biodiesel blend, mixture of two different kinds of biodiesel namely palm (Elaeis guineensis) and jatropha (Jatropha curcas)...
This study investigates the potential use of dimethyl carbonate (DMC), a green, non-toxic and low-reactive biofuel to enable partially premixed low temperature combustion (PPLTC) mode in a DI diesel engine. PPLTC is an intermediate combustion strategy between conventional diesel combustion and homogenous charge compression ignition (HCCI) combustion which provides sufficiently long ignition delay...
Biodiesel is an alternative diesel fuel that is produced from renewable resources. Energy studies conducted over the last two decades focused on solutions to problems of rising fossil fuel price, increasing dependency on foreign energy sources, and environmental concerns. Palm oil biodiesel is mostly used in Malaysia. Engine performance and emission tests were conducted with a single-cylinder diesel...
In recent years there have been significant developments seen in utilization of different derivatives obtained from pyrolysis of waste automobile tyres, as alternative fuels for CI engines. In an investigation, a blend comprising 40% light fraction pyrolysis oil obtained from a tyre recycling plant, 50% diesel and 10% an oxygenate additive Dimethyl carbonate (40LFPO+10DMC) was examined as an alternative...
The present work aims at to improve the engine performance and emission reduction from diesel engine by the addition of fuel additive 1,4-dioxane to the optimum blend (A20) for Annona biodiesel through alternate the fuel properties. The additive (1,4-dioxane) is mixed with optimum blend (A20) in different proportions ranging from 5ml to 10ml such as A20-5ml and A20-10ml (99.0% of A20+1.0% of 1,4-Dioxane)...
This study proposes the use of Grey-Taguchi based multi-response optimization to screen suitable diesel-oxygenate blends for achieving simultaneous reduction of smoke and NOx emissions with maximum performance in a DI diesel engine with minimum number of trials. The effects of factors such as oxygenate type, its blend proportion with diesel and retarded injection timing on emission and performance...
Iso-butanol is a naturally occurring 4-carbon alcohol that can be obtained by processing organic crops like corn and sugarcane. An experimental and statistical investigation is carried out to analyze the effects of injection-pressure, timing and exhaust gas recirculation (EGR) on performance and emissions of a DI diesel engine fuelled with 40% by vol. of iso-butanol/diesel blend. Response surface...
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